Ahh, how my heart skipped a beat and made me think of R'lyeh when I read this. Sadly, seems to be a natural formation created by the pacific rim.
Also sadly, this discovery is likely not going to do much to help the validation of the undersea ruins off Japan that were found back in the 80's.
One wonders how this escaped discovery for so long, however, that is a pretty well mapped part of the world, in underwater terms.
news.bbc.co.uk
(visit the link for the full news article)

